54 citations · 185 across the 7 of their papers we have counts for
7 papers
Zeeman-Doppler Imaging of II Peg - Magnetic field restructuring from 2004 to 2007
T. A. Carroll, M. Kopf, K. G. Strassmeier +2
We present Zeeman-Doppler images of the active K2 star II Peg for the years 2004 and 2007. The surface magnetic field was reconstructed with our new ZDI code "iMap" which provides…
Zeeman-Doppler Imaging : Old Problems and New Methods
T. A. Carroll, M. Kopf, K. G. Strassmeier +1
Zeeman-Doppler Imaging (ZDI) is a powerful inversion method to reconstruct stellar magnetic surface fields. The reconstruction process is usually solved by translating the inverse…
A fast method for Stokes profile synthesis -- Radiative transfer modeling for ZDI and Stokes profile inversion
T. A. Carroll, M. Kopf, K. G. Strassmeier
The major challenges for a fully polarized radiative transfer driven approach to Zeeman-Doppler imaging are still the enormous computational requirements. In every cycle of the ite…
PCA detection and denoising of Zeeman signatures in stellar polarised spectra
M. J. Martinez Gonzalez, A. Asensio Ramos, T. A. Carroll +3
Our main objective is to develop a denoising strategy to increase the signal to noise ratio of individual spectral lines of stellar spectropolarimetric observations. We use a multi…
Zeeman-Tomography of the Solar Photosphere -- 3-Dimensional Surface Structures Retrieved from Hinode Observations
T. A. Carroll, M. Kopf
AIMS :The thermodynamic and magnetic field structure of the solar photosphere is analyzed by means of a novel 3-dimensional spectropolarimetric inversion and reconstruction techniq…
Zeeman-Doppler Imaging of Late-Type Stars -- The Surface Magnetic Field of II Peg
T. A. Carroll, M. Kopf, I. Ilyin +1
Late-type stars in general possess complicated magnetic surface fields which makes their detection and in particular their modeling and reconstruction challenging. In this work we…